Amazing the versatility of hall effect sensors.
Current clamps are handy tools!
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Rancilio S26 running off tank letting hot water back through inlet hose
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::squints:: note to self - set selector on AC to read amperes to element, not DC (I broke my reading glasses last night). Thought that reading looked wrong.
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We should start a What I Have In The Jewel Box sub forum [emoji3]
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Cool! Nice machine. I like Rancilio machines - always have. The Park tools would be GREAT to get inside machines! I'm going to look for some spanners.
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Yes, I'm really happy the new pump worked! I imagine the previous owner's connection to main pressure plus the old worn pump's 4-6bar combined to give ok or just slightly low pressure so it went unnoticed.Originally posted by sprezzatura View PostOops! Just read that new pump solved issue: I'll just say I covet your Park tools [emoji14]
I do have good bike tools from quite a few years working in bike shops, they're quite handy on the coffee machine
This morning I pulled a great double ristretto shot and enjoyed it immensely as a piccolo. Hopefully many more good pours to come
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Ah, ok. My bad. Must be some sort of check valve or expansion valve system between the pump and boiler fill and h.e. system maybe then?
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These don't use an OPV as such, rather, they have a bypass valve fitted to the pump itself which recirculates water from the high-pressure side back to the low-pressure side, once the preset pressure adjustment has been reached... Nothing gets vented back to the drain-tray, or at least, it shouldn't...Originally posted by sprezzatura View PostHave a look at your OPV - is it returning water (too much bypass?) or dumping it into the drain tray?
Mal.
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Oops! Just read that new pump solved issue: I'll just say I covet your Park tools [emoji14]
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Your pump may be generating enough pressures but a bad OPV will bleed it off before it gets through your puck.
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Have a look at your OPV - is it returning water (too much bypass?) or dumping it into the drain tray?
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Thanks Mal, I'll work on my mouse tails
After some more cleaning, descaling and oring changing on the internal check valve returning from the boiler, I think I've got my hot water backflow problem fixed.
That gave me the confidence to swap the procon out and I'm happy to report the new pump is hitting full pressure with ease :-)
A little explanation and group head pressure demo here:
https://youtu.be/d2NfPojL-5U
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